Aerodynamic Characterization of an Off-the-Shelf Aircraft via Flight Test and Numerical Simulation

Bronz, Murat; Hattenberger, Gautier

doi:10.2514/6.2016-3979

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…The aircraft used in the flight tests has already been characterized at different flight speeds by using glide tests as described in. 9 However during the glide phase, the propeller was free-wheeling and generating some additional drag. This is clearly visible in Figure 4, where the propeller generates nearly 0.6 N of negative thrust when it is not powered.…”

Section: Resultsmentioning

confidence: 99%

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In-Flight Thrust Measurement using On-Board Force Sensor

Bronz

Marina

Hattenberger

2017

AIAA Atmospheric Flight Mechanics Conference

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Preliminary results of an in-flight thrust measurement method are presented in order to determine the drag force. Flight experiments are conducted by an off-the-shelf aircraft which has been equipped with an autopilot system and additional sensors measuring the electric motor rotation speed, battery voltage, drawn current, and direct thrust of the motor. Several level cruise flights have been performed in order to measure the thrust, thus the drag force generated by the aircraft. The propulsion system used on the aircraft is first characterized in the wind-tunnel. The direct thrust measurement system which is on-board the aircraft presents a lot of noise coming from vibrations, characteristics of the sensor itself, and also the fuselage wake and propeller interaction. Hence a better estimation of the in-flight thrust and the resultant drag is obtained by sensor fusion of Gaussian signals.

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Section: Resultsmentioning

confidence: 99%

“…This study, being mainly a continuation of, 9 focuses on obtaining in-flight thrust measurements through an on-board mechanism that uses a contact pressure sensor. The direct force sensor measurement during flight is fused with additional sources that estimates the force generated by the propulsion system.…”

Section: A Present Workmentioning

confidence: 99%

In-Flight Thrust Measurement using On-Board Force Sensor

Bronz

Marina

Hattenberger

2017

AIAA Atmospheric Flight Mechanics Conference

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“…Such systems have not yet been installed in large UAS, but have only been used sporadically on manned aircraft. For the aerodynamic characterization of smaller UAS, on-board thrust measurements have been performed in the past, such as presented by M. Bronz and G. Hattenberger [10]. However, for the identification of the flight performance and to show the feasibility of novel technologies in aviation the measurement of drag is essential.…”

Section: Introductionmentioning

confidence: 99%

In-flight Lift and Drag Estimation of an Unmanned Propeller-Driven Aircraft

et al. 2021

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The high-power density and good scaling properties of electric motors enable new propulsion arrangements and aircraft configurations. This results in distributed propulsion systems allowing to make use of aerodynamic interaction effects between individual propellers and the wing of the aircraft, improving flight performance and thus reducing in-flight emissions. In order to systematically analyze these effects, an unmanned research platform was designed and built at the University of Stuttgart. As the aircraft is being used as a testbed for various flight performance studies in the field of distributed electric propulsion, a methodology for precise identification of its performance characteristics is required. One of the main challenges is the determination of the total drag of the aircraft to be able to identify an exact drag and lift polar in flight. For this purpose, an on-board measurement system was developed which allows for precise determination of the thrust of the aircraft which equals the total aerodynamic drag in steady, horizontal flight. The system has been tested and validated in flight using the unmanned free-flight test platform. The article provides an overview of the measuring system installed, discusses its functionality and shows results of the flight tests carried out.

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Finite time tracking control for a small UAV using input-output linearization

Guerra

Döll

2017

IFAC-PapersOnLine

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Aerodynamic Characterization of an Off-the-Shelf Aircraft via Flight Test and Numerical Simulation

Cited by 6 publications

References 5 publications

In-Flight Thrust Measurement using On-Board Force Sensor

In-Flight Thrust Measurement using On-Board Force Sensor

In-flight Lift and Drag Estimation of an Unmanned Propeller-Driven Aircraft

Finite time tracking control for a small UAV using input-output linearization

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